Transcript for Chemical Attack Survivor Haunted by Memories a Year Later

-- was -- like few minutes ago. Can take all of this. Memories. All of this. They're funny pictures out of my hand -- A woman or children or anybody I saw dying suffocating. After I -- early morning prayers around 4:45 AM. When I started hitting the alarms. This terrifying alarms from Damascus. And the rockets flying when I started losing my ability to read and I felt all of this we -- things going on in my body. Started to have doubts whether it's or chemical attack or not. But when or a neighbor. With screaming and yelling and that there are two of her kids suffocating from vomiting this -- -- -- out of their markets. That's the point. Was 100% sure that it's. Chemical attack it's something. We never witnessed before you can barely smell it. Slightly. -- KV there. We think that -- you'll feel like. UVs he -- some some think something happy it's really have a slight killer. Looking -- -- on the side of your loans. To feel your lungs become so happy. And in less than seconds. They need. Didn't set up on fire. -- them on the -- for 26 years this is very small town I grew up with -- -- So. Known almost everybody who. Either the media school or when neighbors. Lost a lot of friends I think I should keep premier and America. Because it's my duty. To make sure that the war and we'll know something horrible brutal and terrifying -- that they want us punish all of war criminals in Syria. And to serve justice for the Syrian people. Who suffer. In the ways people cannot even imagine doing the past four years.

This transcript has been automatically generated and may not be 100% accurate.

Did Syria Use Chemical Weapons on Its People?

Syrian opposition claims hundreds have died in a chemical weapons attack in Damascus.

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